1, Mint Health's default fastcgi process response buffer is 8K, so we can set it larger. In nginxconf, just add fastcgibuffers8 and 128k.
2. This means that Mint's healthy fastcgi buffer is set to 8 blocks with the size of 128k, so that the server 504 will not make an error. The above is how to solve the 504 error of Mint Health Server.